The regeneration characteristics of irradiated jejunal crypt stem cells were studied in mouse qy using a cellcloning technique after local exposure of jejunum to high doses of X-irradiation.

• 本文用深部X线作局部不同大剂量照射一定长度的小鼠小肠区段,照后小肠放回腹腔。13天后取出该段小肠,经处理后,观察受照部位结节生长数来反映小肠干细胞的活存状况。